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Question: Odditity in CircleSum Procedure

Question:Odditity in CircleSum Procedure

Ronan 1022 Maple 2018
procedure infix precedence
May 09 2018
0


I have a procedure which works. ⊕(a,b) gives annwer.   a ⊕ b also gives answer. That was a surprise, discovered from a typing mistake. If b is negative is needs to be enclosed in delay evulation quotes.

2  questions 

Can anyoone expllain this useful property? Any way around having to use delay evaluation quotes for negative numbers?

restart

NULL

``

NULL

`⊕` := proc (a, b) (a+b)/(1-a*b) end proc

proc (a, b) (a+b)/(1-a*b) end proc

 (1)

`⊕`(1, 2)

-3

 (2)

`⊕`(1, 2)

-3

 (3)

`⊕`(`⊕`(`⊕`(1, 2), '-5'), 4)

-32/9

 (4)

``

`⊕`(1, 1/2)

3

 (5)

`⊕`(1/2, '-1')

-1/3

 (6)

"(=)"

-1/3

 (7)

`⊕`(0, h)

h

 (8)

`⊕`(h, 0)

h

 (9)

`⊕`(1/h, '-h')

(1/2)/h-(1/2)*h

 (10)

`⊕`(1/h, -h)

(1/2)/h-(1/2)*h

 (11)

-`⊕`(h, 1/h^2)

-(h+1/h^2)/(1-1/h)

 (12)

"(=)"

(-h^3-1)/(h*(h-1))

 (13)

NULL


 

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